Visitor.h

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/*
 * Visitor.h
 *
 * Smalltalk like class library for C++
 * Abstract object visitor. Header.
 *
 * Copyright (c) 2004 Milan Cermak
 */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef __VISITOR_H
#define __VISITOR_H

#include <stlib/Object.h>

namespace Core {

class Association;
class Boolean;
class Character;
class Collection;
class Dictionary;
class GenericException;
class Number;
class String;

class Visitor : public Object
{
  public:
    /* Class-accessing protocol */
    virtual String *className(void) const;

    /* Visiting protocol */
    virtual void visitAssociation(Association *element);
    virtual void visitBoolean(Boolean *element);
    virtual void visitCharacter(Character *element);
    virtual void visitCollection(Collection *element);
    virtual void visitDictionary(Dictionary *element);
    virtual void visitException(GenericException *element);
    virtual void visitNumber(Number *element);
    virtual void visitObject(Object *element);
    virtual void visitString(String *element);
};

};

#endif /* __VISITOR_H */

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